1. ch. 9;J.G. Speight,2011
2. Singh, S.R., Chaturvedi, A., Dori, L., Ranjan, A., Lodhi, S.K., Singh, A., and Neeraj, G., Int. J. Sci. Res. Rev., 2013, vol. 2, no. 2, pp. 27–35.
3. ch. 3;S. Parkash,2003
4. Dahlberg, A.J. and Mukherjee, U.K., in Encyclopaedia of Hydrocarbons, Amadei, C., Ed., Rome: ENI/Istituto della Enciclopedia italiana, 2006, vol. 2, ch. 6, pp. 273–297.
5. Francis, J., Guillon, E., Bats, N., Pichon, C., Corma, A., and Simon, L.J., Appl. Catal., A, 2011, vols. 409–410, pp. 140–147. https://doi.org/10.1016/j.apcata.2011.09.040